Patients with no complaints of symptoms or painful symptoms from strenuous exercise may be found to have a small amount of fluid in the knee joint area by MRI. If the patient’s symptoms are not particularly pronounced, physical therapy can be used to accelerate blood circulation by using infrared radiation or hot towel compresses to reduce inflammation and pain. If the patient’s symptoms are more obvious, such as pain, swelling, and restricted movement, he or she should seek treatment from a surgeon or rehabilitation physician for the cause, which mainly includes meniscal injury, synovial effusion, and osteophytes.